Perceptor wrote:I found it in a Onerepublic's song "Secrets'. I took that fragment from this song's part:"This time don't need another perfect lieDon't care if critics ever jump in lineI'm gonna give all my secrets away"

Hmm...maybe he means "fall into line"? That's a metaphor from Army service, where it means to line up shoulder to shoulder for inspection. The line is supposed to be perfectly straight, so it used in extended sense to mean "share the same opinion". Cf. "toe the line".

Other interpretations, anyone?

Maybe it means something like "I don't care if critics ever jump on the opportunity to criticize me one after the other."